<template>
  <div class="upload-box">
    <el-upload
      :action="updateUrl"
      :id="uuid"
      :class="['upload', drag ? 'no-border' : '']"
      :multiple="false"
      :show-file-list="false"
      :headers="uploadHeaders"
      :before-upload="beforeUpload"
      :on-success="uploadSuccess"
      :on-error="uploadError"
      :drag="drag"
      :accept="fileType.join(',')"
    >
      <template v-if="modelValue">
        <img :src="modelValue" class="upload-image" />
        <div class="upload-handle" @click.stop>
          <div class="handle-icon" @click="editImg">
            <Icon icon="ep:edit" />
            <span v-if="showBtnText">{{ t('action.edit') }}</span>
          </div>
          <div class="handle-icon" @click="imgViewVisible = true">
            <Icon icon="ep:zoom-in" />
            <span v-if="showBtnText">{{ t('action.detail') }}</span>
          </div>
          <div class="handle-icon" @click="deleteImg" v-if="showDelete">
            <Icon icon="ep:delete" />
            <span v-if="showBtnText">{{ t('action.del') }}</span>
          </div>
        </div>
      </template>
      <template v-else>
        <div class="upload-empty">
          <slot name="empty">
            <Icon icon="ep:plus" />
            <!-- <span>请上传图片</span> -->
          </slot>
        </div>
      </template>
    </el-upload>
    <div class="el-upload__tip">
      <slot name="tip"></slot>
    </div>
    <el-image-viewer
      v-if="imgViewVisible"
      @close="imgViewVisible = false"
      :url-list="[modelValue]"
    />
  </div>
</template>

<script lang="ts" setup>
  import type { UploadProps } from 'element-plus'

  import { generateUUID } from '@/utils'
  import { propTypes } from '@/utils/propTypes'
  import { getAccessToken, getTenantId } from '@/utils/auth'

  defineOptions({ name: 'UploadImg' })

  type FileTypes =
    | 'image/apng'
    | 'image/bmp'
    | 'image/gif'
    | 'image/jpeg'
    | 'image/pjpeg'
    | 'image/png'
    | 'image/svg+xml'
    | 'image/tiff'
    | 'image/webp'
    | 'image/x-icon'

  // 接受父组件参数
  const props = defineProps({
    modelValue: propTypes.string.def(''),
    updateUrl: propTypes.string.def(import.meta.env.VITE_UPLOAD_URL),
    drag: propTypes.bool.def(true), // 是否支持拖拽上传 ==> 非必传（默认为 true）
    disabled: propTypes.bool.def(false), // 是否禁用上传组件 ==> 非必传（默认为 false）
    fileSize: propTypes.number.def(5), // 图片大小限制 ==> 非必传（默认为 5M）
    fileType: propTypes.array.def(['image/jpeg', 'image/png', 'image/gif']), // 图片类型限制 ==> 非必传（默认为 ["image/jpeg", "image/png", "image/gif"]）
    height: propTypes.string.def('150px'), // 组件高度 ==> 非必传（默认为 150px）
    width: propTypes.string.def('150px'), // 组件宽度 ==> 非必传（默认为 150px）
    borderradius: propTypes.string.def('8px'), // 组件边框圆角 ==> 非必传（默认为 8px）
    // 是否显示删除按钮
    showDelete: propTypes.bool.def(true),
    // 是否显示按钮文字
    showBtnText: propTypes.bool.def(true)
  })
  const { t } = useI18n() // 国际化
  const message = useMessage() // 消息弹窗
  // 生成组件唯一id
  const uuid = ref('id-' + generateUUID())
  // 查看图片
  const imgViewVisible = ref(false)

  const emit = defineEmits(['update:modelValue'])

  const deleteImg = () => {
    emit('update:modelValue', '')
  }

  const uploadHeaders = ref({
    Authorization: 'Bearer ' + getAccessToken(),
    'tenant-id': getTenantId()
  })

  const editImg = () => {
    const dom = document.querySelector(`#${uuid.value} .el-upload__input`)
    dom && dom.dispatchEvent(new MouseEvent('click'))
  }

  const beforeUpload: UploadProps['beforeUpload'] = (rawFile) => {
    const imgSize = rawFile.size / 1024 / 1024 < props.fileSize
    const imgType = props.fileType
    if (!imgType.includes(rawFile.type as FileTypes))
      message.notifyWarning('上传图片不符合所需的格式！')
    if (!imgSize) message.notifyWarning(`上传图片大小不能超过 ${props.fileSize}M！`)
    return imgType.includes(rawFile.type as FileTypes) && imgSize
  }

  // 图片上传成功提示
  const uploadSuccess: UploadProps['onSuccess'] = (res: any): void => {
    message.success('上传成功')
    emit('update:modelValue', res.data)
  }

  // 图片上传错误提示
  const uploadError = () => {
    message.notifyError('图片上传失败，请您重新上传！')
  }
</script>
<style scoped lang="scss">
  .is-error {
    .upload {
      :deep(.el-upload),
      :deep(.el-upload-dragger) {
        border: 1px dashed var(--el-color-danger) !important;

        &:hover {
          border-color: var(--el-color-primary) !important;
        }
      }
    }
  }

  :deep(.disabled) {
    .el-upload,
    .el-upload-dragger {
      cursor: not-allowed !important;
      background: var(--el-disabled-bg-color);
      border: 1px dashed var(--el-border-color-darker) !important;

      &:hover {
        border: 1px dashed var(--el-border-color-darker) !important;
      }
    }
  }

  .upload-box {
    .no-border {
      :deep(.el-upload) {
        border: none !important;
      }
    }

    :deep(.upload) {
      .el-upload {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        width: v-bind(width);
        height: v-bind(height);
        overflow: hidden;
        border: 1px dashed var(--el-border-color-darker);
        border-radius: v-bind(borderradius);
        transition: var(--el-transition-duration-fast);

        &:hover {
          border-color: var(--el-color-primary);

          .upload-handle {
            opacity: 1;
          }
        }

        .el-upload-dragger {
          display: flex;
          align-items: center;
          justify-content: center;
          width: 100%;
          height: 100%;
          padding: 0;
          overflow: hidden;
          background-color: transparent;
          border: 1px dashed var(--el-border-color-darker);
          border-radius: v-bind(borderradius);

          &:hover {
            border: 1px dashed var(--el-color-primary);
          }
        }

        .el-upload-dragger.is-dragover {
          background-color: var(--el-color-primary-light-9);
          border: 2px dashed var(--el-color-primary) !important;
        }

        .upload-image {
          width: 100%;
          height: 100%;
          object-fit: contain;
        }

        .upload-empty {
          position: relative;
          display: flex;
          flex-direction: column;
          align-items: center;
          justify-content: center;
          font-size: 12px;
          line-height: 30px;
          color: var(--el-color-info);

          .el-icon {
            font-size: 28px;
            color: var(--el-text-color-secondary);
          }
        }

        .upload-handle {
          position: absolute;
          top: 0;
          right: 0;
          display: flex;
          width: 100%;
          height: 100%;
          cursor: pointer;
          background: rgb(0 0 0 / 60%);
          opacity: 0;
          box-sizing: border-box;
          transition: var(--el-transition-duration-fast);
          align-items: center;
          justify-content: center;

          .handle-icon {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 0 6%;
            color: aliceblue;

            .el-icon {
              margin-bottom: 40%;
              font-size: 130%;
              line-height: 130%;
            }

            span {
              font-size: 85%;
              line-height: 85%;
            }
          }
        }
      }
    }

    .el-upload__tip {
      line-height: 18px;
      text-align: center;
    }
  }
</style>
